<template>
	<div class="popup-result">
		<p class="title">最近5次运行时间</p>
		<ul class="popup-result-scroll">
			<template v-if="isShow">
				<li v-for="item in resultList" :key="item">{{ item }}</li>
			</template>
			<li v-else>计算结果中...</li>
		</ul>
	</div>
</template>

<script>
    export default {
        data() {
            return {
                dayRule: '',
                dayRuleSup: '',
                dateArr: [],
                resultList: [],
                isShow: false
            };
        },
        name: 'CrontabResult',
        methods: {
            // 表达式值变化时，开始去计算结果
            expressionChange() {
                // 计算开始-隐藏结果
                this.isShow = false;
                // 获取规则数组[0秒、1分、2时、3日、4月、5星期、6年]
                const ruleArr = this.$options.propsData.ex.split(' ');
                // 用于记录进入循环的次数
                let nums = 0;
                // 用于暂时存符号时间规则结果的数组
                const resultArr = [];
                // 获取当前时间精确至[年、月、日、时、分、秒]
                const nTime = new Date();
                const nYear = nTime.getFullYear();
                let nMonth = nTime.getMonth() + 1;
                let nDay = nTime.getDate();
                let nHour = nTime.getHours();
                let nMin = nTime.getMinutes();
                let nSecond = nTime.getSeconds();
                // 根据规则获取到近100年可能年数组、月数组等等
                this.getSecondArr(ruleArr[0]);
                this.getMinArr(ruleArr[1]);
                this.getHourArr(ruleArr[2]);
                this.getDayArr(ruleArr[3]);
                this.getMonthArr(ruleArr[4]);
                this.getWeekArr(ruleArr[5]);
                this.getYearArr(ruleArr[6], nYear);
                // 将获取到的数组赋值-方便使用
                const sDate = this.dateArr[0];
                const mDate = this.dateArr[1];
                const hDate = this.dateArr[2];
                const DDate = this.dateArr[3];
                const MDate = this.dateArr[4];
                const YDate = this.dateArr[5];
                // 获取当前时间在数组中的索引
                let sIdx = this.getIndex(sDate, nSecond);
                let mIdx = this.getIndex(mDate, nMin);
                let hIdx = this.getIndex(hDate, nHour);
                let DIdx = this.getIndex(DDate, nDay);
                let MIdx = this.getIndex(MDate, nMonth);
                const YIdx = this.getIndex(YDate, nYear);
                // 重置月日时分秒的函数(后面用的比较多)
                const resetSecond = function() {
                    sIdx = 0;
                    nSecond = sDate[sIdx];
                };
                const resetMin = function() {
                    mIdx = 0;
                    nMin = mDate[mIdx];
                    resetSecond();
                };
                const resetHour = function() {
                    hIdx = 0;
                    nHour = hDate[hIdx];
                    resetMin();
                };
                const resetDay = function() {
                    DIdx = 0;
                    nDay = DDate[DIdx];
                    resetHour();
                };
                const resetMonth = function() {
                    MIdx = 0;
                    nMonth = MDate[MIdx];
                    resetDay();
                };
                // 如果当前年份不为数组中当前值
                if (nYear !== YDate[YIdx]) {
                    resetMonth();
                }
                // 如果当前月份不为数组中当前值
                if (nMonth !== MDate[MIdx]) {
                    resetDay();
                }
                // 如果当前“日”不为数组中当前值
                if (nDay !== DDate[DIdx]) {
                    resetHour();
                }
                // 如果当前“时”不为数组中当前值
                if (nHour !== hDate[hIdx]) {
                    resetMin();
                }
                // 如果当前“分”不为数组中当前值
                if (nMin !== mDate[mIdx]) {
                    resetSecond();
                }

                // 循环年份数组
                // eslint-disable-next-line no-labels
                goYear: for (let Yi = YIdx; Yi < YDate.length; Yi++) {
                    const YY = YDate[Yi];
                    // 如果到达最大值时
                    if (nMonth > MDate[MDate.length - 1]) {
                        resetMonth();
                        continue;
                    }
                    // 循环月份数组
                    // eslint-disable-next-line no-labels
                    goMonth: for (let Mi = MIdx; Mi < MDate.length; Mi++) {
                        // 赋值、方便后面运算
                        let MM = MDate[Mi];
                        MM = MM < 10 ? '0' + MM : MM;
                        // 如果到达最大值时
                        if (nDay > DDate[DDate.length - 1]) {
                            resetDay();
                            if (Mi === MDate.length - 1) {
                                resetMonth();
                                // eslint-disable-next-line no-labels
                                continue goYear;
                            }
                            continue;
                        }
                        // 循环日期数组
                        // eslint-disable-next-line no-labels
                        goDay: for (let Di = DIdx; Di < DDate.length; Di++) {
                            // 赋值、方便后面运算
                            let DD = DDate[Di];
                            let thisDD = DD < 10 ? '0' + DD : DD;

                            // 如果到达最大值时
                            if (nHour > hDate[hDate.length - 1]) {
                                resetHour();
                                if (Di === DDate.length - 1) {
                                    resetDay();
                                    if (Mi === MDate.length - 1) {
                                        resetMonth();
                                        // eslint-disable-next-line no-labels
                                        continue goYear;
                                    }
                                    // eslint-disable-next-line no-labels
                                    continue goMonth;
                                }
                                continue;
                            }

                            // 判断日期的合法性，不合法的话也是跳出当前循环
                            if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true && this.dayRule !== 'workDay' && this.dayRule !== 'lastWeek' && this.dayRule !== 'lastDay') {
                                resetDay();
                                // eslint-disable-next-line no-labels
                                continue goMonth;
                            }
                            // 如果日期规则中有值时
                            if (this.dayRule === 'lastDay') {
                                // 如果不是合法日期则需要将前将日期调到合法日期即月末最后一天

                                if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                    while (DD > 0 && this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                        DD--;

                                        thisDD = DD < 10 ? '0' + DD : DD;
                                    }
                                }
                            } else if (this.dayRule === 'workDay') {
                                // 校验并调整如果是2月30号这种日期传进来时需调整至正常月底
                                if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                    while (DD > 0 && this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                        DD--;
                                        thisDD = DD < 10 ? '0' + DD : DD;
                                    }
                                }
                                // 获取达到条件的日期是星期X
                                const thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + thisDD + ' 00:00:00'), 'week');
                                // 当星期日时
                                if (thisWeek === 1) {
                                    // 先找下一个日，并判断是否为月底
                                    DD++;
                                    thisDD = DD < 10 ? '0' + DD : DD;
                                    // 判断下一日已经不是合法日期
                                    if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                        DD -= 3;
                                    }
                                } else if (thisWeek === 7) {
                                    // 当星期6时只需判断不是1号就可进行操作
                                    if (this.dayRuleSup !== 1) {
                                        DD--;
                                    } else {
                                        DD += 2;
                                    }
                                }
                            } else if (this.dayRule === 'weekDay') {
                                // 如果指定了是星期几
                                // 获取当前日期是属于星期几
                                const thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + DD + ' 00:00:00'), 'week');
                                // 校验当前星期是否在星期池（dayRuleSup）中
                                if (this.dayRuleSup.indexOf(thisWeek) < 0) {
                                    // 如果到达最大值时
                                    if (Di === DDate.length - 1) {
                                        resetDay();
                                        if (Mi === MDate.length - 1) {
                                            resetMonth();
                                            // eslint-disable-next-line no-labels
                                            continue goYear;
                                        }
                                        // eslint-disable-next-line no-labels
                                        continue goMonth;
                                    }
                                    continue;
                                }
                            } else if (this.dayRule === 'assWeek') {
                                // 如果指定了是第几周的星期几
                                // 获取每月1号是属于星期几
                                const thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + DD + ' 00:00:00'), 'week');
                                if (this.dayRuleSup[1] >= thisWeek) {
                                    DD = (this.dayRuleSup[0] - 1) * 7 + this.dayRuleSup[1] - thisWeek + 1;
                                } else {
                                    DD = this.dayRuleSup[0] * 7 + this.dayRuleSup[1] - thisWeek + 1;
                                }
                            } else if (this.dayRule === 'lastWeek') {
                                // 如果指定了每月最后一个星期几
                                // 校验并调整如果是2月30号这种日期传进来时需调整至正常月底
                                if (this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                    while (DD > 0 && this.checkDate(YY + '-' + MM + '-' + thisDD + ' 00:00:00') !== true) {
                                        DD--;
                                        thisDD = DD < 10 ? '0' + DD : DD;
                                    }
                                }
                                // 获取月末最后一天是星期几
                                const thisWeek = this.formatDate(new Date(YY + '-' + MM + '-' + thisDD + ' 00:00:00'), 'week');
                                // 找到要求中最近的那个星期几
                                if (this.dayRuleSup < thisWeek) {
                                    DD -= thisWeek - this.dayRuleSup;
                                } else if (this.dayRuleSup > thisWeek) {
                                    DD -= 7 - (this.dayRuleSup - thisWeek);
                                }
                            }
                            // 判断时间值是否小于10置换成“05”这种格式
                            DD = DD < 10 ? '0' + DD : DD;

                            // 循环“时”数组
                            // eslint-disable-next-line no-labels
                            goHour: for (let hi = hIdx; hi < hDate.length; hi++) {
                                const hh = hDate[hi] < 10 ? '0' + hDate[hi] : hDate[hi];

                                // 如果到达最大值时
                                if (nMin > mDate[mDate.length - 1]) {
                                    resetMin();
                                    if (hi === hDate.length - 1) {
                                        resetHour();
                                        if (Di === DDate.length - 1) {
                                            resetDay();
                                            if (Mi === MDate.length - 1) {
                                                resetMonth();
                                                // eslint-disable-next-line no-labels
                                                continue goYear;
                                            }
                                            // eslint-disable-next-line no-labels
                                            continue goMonth;
                                        }
                                        // eslint-disable-next-line no-labels
                                        continue goDay;
                                    }
                                    continue;
                                }
                                // 循环"分"数组
                                // eslint-disable-next-line no-labels
                                goMin: for (let mi = mIdx; mi < mDate.length; mi++) {
                                    const mm = mDate[mi] < 10 ? '0' + mDate[mi] : mDate[mi];

                                    // 如果到达最大值时
                                    if (nSecond > sDate[sDate.length - 1]) {
                                        resetSecond();
                                        if (mi === mDate.length - 1) {
                                            resetMin();
                                            if (hi === hDate.length - 1) {
                                                resetHour();
                                                if (Di === DDate.length - 1) {
                                                    resetDay();
                                                    if (Mi === MDate.length - 1) {
                                                        resetMonth();
                                                        // eslint-disable-next-line no-labels
                                                        continue goYear;
                                                    }
                                                    // eslint-disable-next-line no-labels
                                                    continue goMonth;
                                                }
                                                // eslint-disable-next-line no-labels
                                                continue goDay;
                                            }
                                            // eslint-disable-next-line no-labels
                                            continue goHour;
                                        }
                                        continue;
                                    }
                                    // 循环"秒"数组
                                    for (let si = sIdx; si <= sDate.length - 1; si++) {
                                        const ss = sDate[si] < 10 ? '0' + sDate[si] : sDate[si];
                                        // 添加当前时间（时间合法性在日期循环时已经判断）
                                        if (MM !== '00' && DD !== '00') {
                                            resultArr.push(YY + '-' + MM + '-' + DD + ' ' + hh + ':' + mm + ':' + ss);
                                            nums++;
                                        }
                                        // 如果条数满了就退出循环
                                        // eslint-disable-next-line no-labels
                                        if (nums === 5) break goYear;
                                        // 如果到达最大值时
                                        if (si === sDate.length - 1) {
                                            resetSecond();
                                            if (mi === mDate.length - 1) {
                                                resetMin();
                                                if (hi === hDate.length - 1) {
                                                    resetHour();
                                                    if (Di === DDate.length - 1) {
                                                        resetDay();
                                                        if (Mi === MDate.length - 1) {
                                                            resetMonth();
                                                            // eslint-disable-next-line no-labels
                                                            continue goYear;
                                                        }
                                                        // eslint-disable-next-line no-labels
                                                        continue goMonth;
                                                    }
                                                    // eslint-disable-next-line no-labels
                                                    continue goDay;
                                                }
                                                // eslint-disable-next-line no-labels
                                                continue goHour;
                                            }
                                            // eslint-disable-next-line no-labels
                                            continue goMin;
                                        }
                                    } // goSecond
                                } // goMin
                            }// goHour
                        }// goDay
                    }// goMonth
                }
                // 判断100年内的结果条数
                if (resultArr.length === 0) {
                    this.resultList = ['没有达到条件的结果！'];
                } else {
                    this.resultList = resultArr;
                    if (resultArr.length !== 5) {
                        this.resultList.push('最近100年内只有上面' + resultArr.length + '条结果！');
                    }
                }
                // 计算完成-显示结果
                this.isShow = true;
            },
            // 用于计算某位数字在数组中的索引
            getIndex(arr, value) {
                if (value <= arr[0] || value > arr[arr.length - 1]) {
                    return 0;
                } else {
                    for (let i = 0; i < arr.length - 1; i++) {
                        if (value > arr[i] && value <= arr[i + 1]) {
                            return i + 1;
                        }
                    }
                }
            },
            // 获取"年"数组
            getYearArr(rule, year) {
                this.dateArr[5] = this.getOrderArr(year, year + 100);
                if (rule !== undefined) {
                    if (rule.indexOf('-') >= 0) {
                        this.dateArr[5] = this.getCycleArr(rule, year + 100, false);
                    } else if (rule.indexOf('/') >= 0) {
                        this.dateArr[5] = this.getAverageArr(rule, year + 100);
                    } else if (rule !== '*') {
                        this.dateArr[5] = this.getAssignArr(rule);
                    }
                }
            },
            // 获取"月"数组
            getMonthArr(rule) {
                this.dateArr[4] = this.getOrderArr(1, 12);
                if (rule.indexOf('-') >= 0) {
                    this.dateArr[4] = this.getCycleArr(rule, 12, false);
                } else if (rule.indexOf('/') >= 0) {
                    this.dateArr[4] = this.getAverageArr(rule, 12);
                } else if (rule !== '*') {
                    this.dateArr[4] = this.getAssignArr(rule);
                }
            },
            // 获取"日"数组-主要为日期规则
            getWeekArr(rule) {
                // 只有当日期规则的两个值均为“”时则表达日期是有选项的
                if (this.dayRule === '' && this.dayRuleSup === '') {
                    if (rule.indexOf('-') >= 0) {
                        this.dayRule = 'weekDay';
                        this.dayRuleSup = this.getCycleArr(rule, 7, false);
                    } else if (rule.indexOf('#') >= 0) {
                        this.dayRule = 'assWeek';
                        const matchRule = rule.match(/[0-9]/g);
                        this.dayRuleSup = [Number(matchRule[1]), Number(matchRule[0])];
                        this.dateArr[3] = [1];
                        if (this.dayRuleSup[1] === 7) {
                            this.dayRuleSup[1] = 0;
                        }
                    } else if (rule.indexOf('L') >= 0) {
                        this.dayRule = 'lastWeek';
                        this.dayRuleSup = Number(rule.match(/[0-9]{1,2}/g)[0]);
                        this.dateArr[3] = [31];
                        if (this.dayRuleSup === 7) {
                            this.dayRuleSup = 0;
                        }
                    } else if (rule !== '*' && rule !== '?') {
                        this.dayRule = 'weekDay';
                        this.dayRuleSup = this.getAssignArr(rule);
                    }
                }
            },
            // 获取"日"数组-少量为日期规则
            getDayArr(rule) {
                this.dateArr[3] = this.getOrderArr(1, 31);
                this.dayRule = '';
                this.dayRuleSup = '';
                if (rule.indexOf('-') >= 0) {
                    this.dateArr[3] = this.getCycleArr(rule, 31, false);
                    this.dayRuleSup = 'null';
                } else if (rule.indexOf('/') >= 0) {
                    this.dateArr[3] = this.getAverageArr(rule, 31);
                    this.dayRuleSup = 'null';
                } else if (rule.indexOf('W') >= 0) {
                    this.dayRule = 'workDay';
                    this.dayRuleSup = Number(rule.match(/[0-9]{1,2}/g)[0]);
                    this.dateArr[3] = [this.dayRuleSup];
                } else if (rule.indexOf('L') >= 0) {
                    this.dayRule = 'lastDay';
                    this.dayRuleSup = 'null';
                    this.dateArr[3] = [31];
                } else if (rule !== '*' && rule !== '?') {
                    this.dateArr[3] = this.getAssignArr(rule);
                    this.dayRuleSup = 'null';
                } else if (rule === '*') {
                    this.dayRuleSup = 'null';
                }
            },
            // 获取"时"数组
            getHourArr(rule) {
                this.dateArr[2] = this.getOrderArr(0, 23);
                if (rule.indexOf('-') >= 0) {
                    this.dateArr[2] = this.getCycleArr(rule, 24, true);
                } else if (rule.indexOf('/') >= 0) {
                    this.dateArr[2] = this.getAverageArr(rule, 23);
                } else if (rule !== '*') {
                    this.dateArr[2] = this.getAssignArr(rule);
                }
            },
            // 获取"分"数组
            getMinArr(rule) {
                this.dateArr[1] = this.getOrderArr(0, 59);
                if (rule.indexOf('-') >= 0) {
                    this.dateArr[1] = this.getCycleArr(rule, 60, true);
                } else if (rule.indexOf('/') >= 0) {
                    this.dateArr[1] = this.getAverageArr(rule, 59);
                } else if (rule !== '*') {
                    this.dateArr[1] = this.getAssignArr(rule);
                }
            },
            // 获取"秒"数组
            getSecondArr(rule) {
                this.dateArr[0] = this.getOrderArr(0, 59);
                if (rule.indexOf('-') >= 0) {
                    this.dateArr[0] = this.getCycleArr(rule, 60, true);
                } else if (rule.indexOf('/') >= 0) {
                    this.dateArr[0] = this.getAverageArr(rule, 59);
                } else if (rule !== '*') {
                    this.dateArr[0] = this.getAssignArr(rule);
                }
            },
            // 根据传进来的min-max返回一个顺序的数组
            getOrderArr(min, max) {
                const arr = [];
                for (let i = min; i <= max; i++) {
                    arr.push(i);
                }
                return arr;
            },
            // 根据规则中指定的零散值返回一个数组
            getAssignArr(rule) {
                const arr = [];
                const assiginArr = rule.split(',');
                for (let i = 0; i < assiginArr.length; i++) {
                    arr[i] = Number(assiginArr[i]);
                }
                arr.sort(this.compare);
                return arr;
            },
            // 根据一定算术规则计算返回一个数组
            getAverageArr(rule, limit) {
                const arr = [];
                const agArr = rule.split('/');
                let min = Number(agArr[0]);
                const step = Number(agArr[1]);
                while (min <= limit) {
                    arr.push(min);
                    min += step;
                }
                return arr;
            },
            // 根据规则返回一个具有周期性的数组
            getCycleArr(rule, limit, status) {
                // status--表示是否从0开始（则从1开始）
                const arr = [];
                const cycleArr = rule.split('-');
                const min = Number(cycleArr[0]);
                let max = Number(cycleArr[1]);
                if (min > max) {
                    max += limit;
                }
                for (let i = min; i <= max; i++) {
                    let add = 0;
                    if (status === false && i % limit === 0) {
                        add = limit;
                    }
                    arr.push(Math.round(i % limit + add));
                }
                arr.sort(this.compare);
                return arr;
            },
            // 比较数字大小（用于Array.sort）
            compare(value1, value2) {
                if (value2 - value1 > 0) {
                    return -1;
                } else {
                    return 1;
                }
            },
            // 格式化日期格式如：2017-9-19 18:04:33
            formatDate(value, type) {
                // 计算日期相关值
                const time = typeof value == 'number' ? new Date(value) : value;
                const Y = time.getFullYear();
                const M = time.getMonth() + 1;
                const D = time.getDate();
                const h = time.getHours();
                const m = time.getMinutes();
                const s = time.getSeconds();
                const week = time.getDay();
                // 如果传递了type的话
                if (type === undefined) {
                    return Y + '-' + (M < 10 ? '0' + M : M) + '-' + (D < 10 ? '0' + D : D) + ' ' + (h < 10 ? '0' + h : h) + ':' + (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s);
                } else if (type === 'week') {
                    // 在quartz中 1为星期日
                    return week + 1;
                }
            },
            // 检查日期是否存在
            checkDate(value) {
                const time = new Date(value);
                const format = this.formatDate(time);
                return value === format;
            }
        },
        watch: {
            'ex': 'expressionChange'
        },
        props: {
            ex: {
                type: String,
                default: ''
            }
        },
        mounted: function() {
            // 初始化 获取一次结果
            this.expressionChange();
        }
    };

</script>
